Analysis on application value of heated humidifier of BiPAP ventilator in the treatment of type II respiratory failure / 中国医学装备

Objective: To analyze the application value of heated humidifier and water humidifier of BiPAP ventilator in the treatment of type II respiratory failure. Methods: The clinical data of 50 patients with type II respiratory failure were statistically analyzed, and these patients were divided into heated humidifier group (adopted heated humidifier, n=25) and water humidifier group (adopted water humidifier, n=25) according to the difference of humidifying device of BiPAP ventilator. The PaO2, PaCO2, pH and the effect of humidifier for upper respiratory tract with dry sensation between pre-and post treatment were analyzed by statistical method. Results: The values of PaO2and pH of heated humidifier group were significantly higher than that of water humidifier group (t=4.303, t=3.182, P<0.05), respectively. While the PaCO2of heated humidifier group was significantly lower than that of water humidifier group (t=6.965, P<0.05). In the contrast of dry sensation of upper respiratory tract, the ratio of non-dry sensation in heated humidifier group was 84.0% (21/25) and it was 32.0% (8/25) in water humidification group, and the difference between the two groups was significant (x2=12.83, P<0.05). And the ratio of general dry sensation in heated humidifier group was 16.0% (4/25) and it was 40.0% (10/25) in water humidification group, and the ratio of heated humidifier group was significantly lower than that of water humidifier group (x2=5.02, P<0.05). Besides, the ratio of worst dry sensation in heated humidifier group was 0 and it was 28.0% (7/25) in water humidifier group, and the ratio of heated humidifier group was significantly lower than that of water humidifier group (x2=7.38, P<0.05). Conclusion: In the treatment of type II respiratory failure by using BiPAP ventilator, the application value and effect of heated humidifier is higher than that of water humidifier, so it is worthy to promote and use the heated humidifier in clinical practice.

Airway humidfi icationd urin g mechanical ventilation / 中国小儿急救医学

Humidificait on by artificial means must be provided when the upper airway is bypassed during mechanical ventilation.Enough humidification is very important during mechanical ventilation.Heated humidification( HH) and heta and moisture exchanger( HME) are the most commonly used types of artificial humidification in this situation.In this article, their advantages and disadvantages are itn roduced.HH na d HME are compared in humidification performance,effect no ventilator mechanics and association with venti-lation associated pneumonia.Depending on the clinical scenario, humidifier is reasonably selected, and the selection may changeo ver time according the treatment effect.

The effect of electrically heated humidifier on the body temperature and blood loss in spinal surgery under general anesthesia / 대한마취과학회지

BACKGROUND: General anesthesia often produces some degree of hypothermia and hypothermia causes much more blood loss during surgery than normothermia. Electrically heated humidifiers (EHHs) have been used for patients under general anesthesia and in the intensive care unit. However, the benefits of the EHH have not been widely reported in the literature. METHODS: Patients scheduled for posterior lumbar spine fusion, were randomly assigned to a mechanically ventilated with EHH circuit group or to a conventional respiratory circuit group. Their tympanic membrane temperature was monitored every 30 min after induction up to 180 min, and perioperative blood losses, transfusion requirements during surgery, and other complications were noted. RESULTS: Patients in the control group (n = 40) showed a lower mean body temperature at all times than immediately after induction, while the EHH group (n = 40) showed a lower body temperature from 60 minute after induction comparing to the initial temperature. Furthermore, patients in the EHH group had a higher mean body temperature than patients in the control group during surgery (35.9 +/- 0.4 vs 35.4 +/- 0.5, P < 0.001). Mean intraoperative blood loss (9.75 +/- 5.4 vs 7.48 +/- 3.9, P = 0.035) and transfusion requirements (57.5% vs 25%, P = 0.006) were significantly less in the EHH group, but postoperative blood loss, duration of hospitalization, and other complications were not significantly different in the two study groups. CONCLUSIONS: The use of an electrically heated humidifier did not prevent a body temperature drop under general anesthesia. However, it helped maintain body temperature and was associated less blood loss and transfusion requirement during surgery.

Research in the replacement of heated humidifiers with heat moisture exchangers during mechanical ventilation / 中国实用护理杂志

Objective To study the feasibility of using heat and moisture exchangers (HME)as an alternative to heated humidifiers (HH) in patients undergoing mechanical ventilation. Methods 266 pa-tients with mechanical ventilation admitted to our ICU over the recent 3 years were allocated to the experi-mental group (humidification with a heat and moisture exchanger) and the control group (with heated hu-midifier), and the effect of humidification, the reserved time of artificial airway, the time on mechanical yen-tilation, the time of stay in ICU, the ineidenee of ventilator-associated pneumonia (VAP) and the mor-tality rate were comparatively studied and analyzed. Results Significant differences were found between the experimental and the control group in effect of humidification, insufficiency of humidification or excessive hu-midification, airway spasm and time on mechanical ventilation and time of stay in ICU. The incidence of VAP in the control group was significantly higher than that in the experimental group. There were no significant dif-ference between the two groups in the reserved time of artificial airway and the mortality rate. There were no accident of humidification occurred in the experimental group while there were one case complicated with air-way burn and 11 eases complicated with choking with water in the control group. Conclusions We conclude that HH can be replaced by HME on mechanical ventilation while disease evolution and effect of humidification should be monitored closely and keep HME unobstructed.